Salt-in-Salt Reinforced Carbonate Electrolyte for Li Metal Batteries

dc.contributor.authorLiu, Sufu
dc.contributor.authorZhang, Weiran
dc.contributor.authorWan, Hongli
dc.contributor.authorZhang, Jiaxun
dc.contributor.authorXu, Jijian
dc.contributor.authorRao, Jiancun
dc.contributor.authorDeng, Tao
dc.contributor.authorHou, Singyuk
dc.contributor.authorNan, Bo
dc.contributor.authorWang, Chunsheng
dc.date.accessioned2023-09-28T19:34:37Z
dc.date.available2023-09-28T19:34:37Z
dc.date.issued2022-08-30
dc.description.abstractThe instability of carbonate electrolyte with metallic Li greatly limits its application in high-voltage Li metal batteries. Here, a “salt-in-salt” strategy is applied to boost the LiNO3 solubility in the carbonate electrolyte with Mg(TFSI)2 carrier, which enables the inorganic-rich solid electrolyte interphase (SEI) for excellent Li metal anode performance and also maintains the cathode stability. In the designed electrolyte, both NO3− and PF6− anions participate in the Li+-solvent complexes, thus promoting the formation of inorganic-rich SEI. Our designed electrolyte has achieved a superior Li CE of 99.7 %, enabling the high-loading NCM811||Li (4.5 mAh cm−2) full cell with N/P ratio of 1.92 to achieve 84.6 % capacity retention after 200 cycles. The enhancement of LiNO3 solubility by divalent salts is universal, which will also inspire the electrolyte design for other metal batteries.
dc.description.urihttps://doi.org/10.1002/anie.202210522
dc.identifierhttps://doi.org/10.13016/dspace/o3yz-ayb2
dc.identifier.citationS. Liu, J. Xia, W. Zhang, H. Wan, J. Zhang, J. Xu, J. Rao, T. Deng, S. Hou, B. Nan, C. Wang, Angew. Chem. Int. Ed. 2022, 61, e202210522; Angew. Chem. 2022, 134, e202210522.
dc.identifier.urihttp://hdl.handle.net/1903/30625
dc.publisherWiley
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtChemical & Biomolecular Engineeringen_us
dc.subjectsalt in salt
dc.subjectcarbonate electrolyte
dc.subjectdendrite-free
dc.subjectinorganic interphase
dc.subjectlithium metal batteries
dc.titleSalt-in-Salt Reinforced Carbonate Electrolyte for Li Metal Batteries
dc.typeArticle
local.equitableAccessSubmissionNo

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